Hand-hole plate.



PATENTED SEPT. 22, 1903.

' L. RAUHAUSER.

HAND HOLE PLATE. AI'PLIUATIOH PILBD A123. 13. 1908.

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UNITED STATES Patented September 22, 1903. i

Louis nAuHAusna-or BROOKLYN, NEW roan;

HAND-HOLE PLATE.

SPEGIFIGATION forming part of Letters Patent No. 739,790, datedSeptember 22, 19b3,

Griginal application filed January 27, ons, serial to. 140,699, Dividedand this application filed April 13,

1903. Serial no. 152,343. 7 (No model.)

To all whom it may concern.-

Be it known that I, LOUIS RAUHAUSER,-2L citizen of the United States,and a resident of Brooklyn, in the county of Kings and State haveinvented certain new and useful Improvements in Hand-Hole Plates, ofwhich the following is a specification.

This application is a division of my application for Letters Patentforimprovements in steam-generators, filed January 27, 1903, Serial No.140,699.

The invention relates to improvements in hand-hole plates forsteam-generators and the like; and it consists in the novel features,arrangement, and combinations of parts hereinafter described, andparticularly pointed out in the claims.

The object of the invention is to provide a novel construction ofhand-hole plate adapted to be inserted through a round hole less indiameter than the diameter of the plate, the latter when its parts aretogether being greater in diameter than the diameter of said hole.

The invention is particularly applicable for use in steam-generatorsemploying tubes for the passage of the products of combustion or waterand in which a separate hand-hole plate is to be provided in line witheach of said tubes.

the detailed description hereinafter presented, reference being had tothe accompanying drawings, in which- Figure 1 is a vertical sectionthrough a portion of a steam-generator and illustrates a part of awater-leg thereof leading toone of the usual tubes, the outer plate ofthe waterleg in line with said tube being equipped with a hand-holeplate constructed in accordance with and embodying the presentinvention. Fig. 2 is an end view of the inner end of one of thehand-hole plates detached from its securing means; and Fig. 3 is anelevation taken from the right-hand side of Fig. 1 and illustrates thesaid hand-hole plate in position, the dotted line 1 l of Fig. 3indicating the section on which Fig. 1 is taken.

In the drawings, 10 designates a portion of 5c ausual-construction ofwater-leg, comprising latter of which the tube plates 11 12, to the Theinvention will be fully understood from 13 is secured in the usualmanner, while the plate 11 is an exterior exposed plate and contains anaperture 14 in line with the tube 13.

The present invention pertains specifically to a novel construction ofhand-hole plate adapted for closing the aperture or hole 14 in the plate11, but is not, of course, confined to any special construction ofwater-leg 10 or to any special construction of steam-genera tor, thewater-leg 10 and tube 13 being illustrated for the purpose of more fullydisclosing the utility and operation of my invention.

The hand-hole plate comprises the two disksections 15 16, which whenbrought together form a complete disk having an outer circularprojecting portion 17 to enter the hole 14 in the plate 11 and an innerannular flange 18 to press against the inner surface of said platearound and exterior to the hole 14 therein. The disk-sections 15 16 areprovided with the overlapping flanges 19 20, respectively, which arecentrally apertured to receive the bolt 21, the latter carrying at itsinner end the concave head 22 and at its outer end passing through theframe 23 and receiving the nut 24. The flange or section of thedisk-section 16 is at one edge formed with the recess 25 to receive thecorrespond ingly-shaped lug 26, formed on the other disksection, 15,this recess and lug being provided to effect the interlocking of thesections 15 16, so that when they are together they will at their outeredges define a circle.

The purpose of constructing the hand-hole plate of the sections 15 16 ofthe character described is to enable the introduction of said .platethrough the round hole 14 in the plate 11, the diameter of this hole 14being less than the diameter of the hand-hole plate when its parts aretogether, as shown in Figs. 1 and 3. In introducing the hand e holeplate through the hole in the plate 11 I first place the section 16 uponthe bolt 21 and insert the head end of said bolt and said section 16through the hole 14 in said plate 11, tilting the section 16 to someextent, so as to work it through said hole, and I then allow the section15 to slide down on the bolt 21 and work it through the hole 14 in theplate 11, and thereafter 1 match the sections 15 16, so that they havethe position illustrated in'Fig. 2, and then draw said sectionsoutwardly against the inner wall of the plate 11 and secure all of theparts together and in position by means of the nut 24. and frame 23. Thehole 14 in the plate 11 is large enough to admit a persons hand, andhence in applying the sections 15 16 through said hole the bolt 21 maybe passed inwardly until the head 22 thereof actually enters theadjacent tube 13. The space between the plates 11 12, forming thewater-leg, is adequate to admit of the tilting of the bolt 21 andsections 15 16 duringtheir introduction. through the hole 14, and hencewith the hand-hole plate made of the 'sections 15 16 I am enabled toapply the handhole plate against the inner surface of the plate 11 in anefficient and convenient manner. The hand-hole plate of the constructiondescribed is also capablev of being removed from position in aconvenient manner by simply reversing the operations followed in itsapplication to position. The head 22, carried by the bolt 21, is madeconcave, as shown in Fig. 1, and this head receives and fits upon a hub27, formed by an inwardly-projecting portion of the sections 16, andwhen this hub 27 is within the head 22 it prevents any accidentalseparation of the sections 15 16 from each other and serves to hold thelug 26 of the section 15 into the recess 25 of the section 16. The head22 engages a substantial portion of the inner surface of the hand-holeplate and enables said plate to be very firmly secured against the innersurfaces of the plate 11 with the circular projecting portion 1'7 withinthe hole 14.- of said plate 11.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The hand-hole plate comprising the sections 15, 16 having theoverlapping central portions 19, 20, the bolt 21 passing through saidcentral portions and having a head at its inner end to engage saidsections, the frame through which the outer end of said bolt passes, andthe nut for said bolt; substan tially as set forth.

2. The hand-holeplate comprising the sections 15, 16 having theoverlapping central portions 19, respectively provided with theinterlocking recess and lug 26, the bolt 21 passing through said centralportions and having a head at its inner end to engage said sections, theframe through which the outer end of said bolt passes, and the nut forsaid bolt; substantially as set forth.

3. The hand-hole plate comprising the sections 15, 16 having theoverlapping central portions and matching inner portions forming the hub27, the bolt passing through said central portions and having theconcave head 22 at its inner end to fit upon said hub, the frame throughwhich the outer end of said bolt passes, and the nut for said bolt;substantially as set forth.

4. The hand-hole plate comprising sections having theoutwardly-projecting portion 17 set inwardly at its edges from the outeredges of the plate so that said portion 17 may enter the hole to beclosed, and the overlapping central portions 19, 20, combined with thebolt 21 passing through said central portions and having a head at itsinner end to engage said sections, the frame through which the outer endof said bolt passes, and the nut for said bolt; substantially as setforth.

Signed at New York, in the county of New York and State of New York,this 11th day of April, A. D. 1903.

LOUIS RAUHAUSER.

Witnesses:

ARTHUR MARION, CHAS. O. GILL.

